add config.h in all .h files in interfaces
add config.h in all .h files in shogun/base
add config.h in all .h files in shogun/clustering
add config.h in all .h files in shogun/converter
add config.h in all .h files in shogun/distance
add config.h in all .h files in shogun/distributions
add config.h in all .h files in shogun/ensemble
add config.h in all .h files in shogun/evaluation
add config.h in all .h files in shogun/features
add config.h in all .h files in shogun/io
add config.h in all .h files in shogun/kernel
add config.h in all .h files in shogun/labels
add config.h in all .h files in shogun/latent
add config.h in all .h files in shogun/lib
add config.h in all .h files in shogun/loss
add config.h in all .h files in shogun/machine
add config.h in all .h files in shogun/mathematics
add config.h in all .h files in shogun/modelselection
add config.h in all .h files in shogun/multiclass
add config.h in all .h files in shogun/optimization